Technical characteristics of the telescopic aerial platform

See also: Technical characteristics of the articulated aerial platform

The telescopic design is the most modern to date. The system of box beams nested inside each other provides compactness with a significant boom length when unfolded. The hydraulic drive is also the most compact solution with minimal weight for a given performance.

Many companies produce aerial platforms based on their own research, so the designs of different companies can vary significantly. We combined them according to their main characteristics and classified them according to their characteristics.

Telescopic lifts and towers differ in four main characteristics and three additional ones.

The main ones matter when choosing a machine based on the general tasks for it.

Additional ones are needed for more accurate selection of the car.

Main characteristics

Maximum working height

The maximum working height (MAH) is calculated as the distance from the parking lot to the cradle floor at the highest point. Sometimes the technical specifications (TC) indicate a service height that is greater than the maximum height by approximately the average height of a person. The height of the AGP should be selected with a boom length margin of 2-3 meters.

10-18 meters

For maintenance work on the city electrical network and poles. The height of 18 meters correlates with the height of a 5-story building.

A small MDV does not always mean that the base chassis is a light truck. AGP with a small MPV is installed on a high-pass chassis, for example, VIPO-18-01 GAZ-33086. There are also compact models that allow you to work at a height of up to 26 meters with a reach of up to 14 meters based on a chassis with the dimensions of a passenger car (Dasan DS280S Hyundai Mighty).

19-28 meters

Maintenance of buildings with 9 floors, overpasses, for installation work

Medium-height lifts can be installed on a high-pass chassis with a 6x6 formula (VIPO-24-01 24 KAMAZ-43118), on a regular city truck (VIPO-24-01 GAZ 33086) or on the basis of an all-metal van (Socage 12VT Ford Transit, Klubb K21B Peugeot Expert)

29-45 meters

Maintenance of high-rise buildings, structures, structures, installation and rescue work.

There are also cargo aerial platforms or telescopic winch lifts such as Woosung WS-L45 on the Hyundai HD35 chassis

More than 45 meters

Lifts based on heavy city trucks with a wheel arrangement of 4x6, 6x6, 4x8, 4x10 and more.

The most popular bases for AGP over 45 meters:

● Hyundai

●Volvo

● Daewoo

●Mercedes

●MAN

The supporting contour of such lifts can reach 100 m2 or dimensions of 10x10 meters.

Car engine

Despite the fact that the first production model of the car in question was released back in 1966, the technical characteristics of the engine in many areas satisfy the needs of the Russian army even today:

Thanks to its great power and high torque, the ZIL-131 could reach speeds of up to 85 km/h on the highway. Considering the year of manufacture, this parameter can be called quite impressive.

Not every passenger car of those years could move so fast, not to mention trucks of such a large mass.

The fuel consumption of the ZIL-131, shown in the photo on the right, with a mixed driving cycle is 49.5 liters per 100 km at an average speed of 60 km/h.

According to the technical specifications, the engine is designed to work with AI-76 gasoline or a similar one, but with a higher octane number.

Maximum horizontal boom reach

The maximum horizontal reach (MHR) of the boom is the maximum distance in plan from the turret axis to the edge of the cradle. This TX is linked to three other parameters of the lift:

● Boom length - MGV physically cannot be greater than the boom length

● Chassis weight - the higher it is, the greater the reach it can balance

● Dimensions of the support contour - the greater the distance from the center of gravity of the machine to the support points (jacks, paws, outriggers), the larger the lever can balance the chassis with the turret.

Therefore, models with a shorter boom length may have a greater maximum reach than models with a longer boom.

An example of the disproportionality of MGV and MDV in different models

MGV affects the carrying capacity of the cradle. The documentation for each model contains diagrams indicating the exact load capacity of the cradle on each section of the boom at different sections of the reach.

On average, the lift retains 100% of the cradle's load capacity (HL) at 70% of the reach.

The GL at maximum reach cannot be less than 80 kg.

Many modern AGPs have a critical departure alarm.

additional characteristics

Cabin design

The cabin can be single-row or double-row. A useful function of a two-row cabin is the transportation of up to 3 additional workers or a set of tools, equipment, and building materials.

The chassis model can be made in both versions:

● VIPO-20-01-01 GAZ-3309

● VIPO-20-01-07 GAZ-3309 DK

The double-row cabin is most suitable for duty and emergency crews.

Cradle rotation angle

The ability to adjust the angle affects the maneuverability of the cradle and the comfort of workers. The greater the degree of rotation, the more accurate the delivery of the cradle to the workplace and the faster the work is done at the point.

Most common angles:

● 0О — PSS-131.18E MAZ-533702

● 90О — VIPO-24-01 KAMAZ-43253

● 180О — Socage T-322 22 KAMAZ-43253

● 360О — Hansin HS450A Daewoo Novus

Adjustment at height is carried out from the remote control in the cradle or the remote control.

Cradle material

Three versions of the cradle:

● Steel - VIPO-28-01 KAMAZ-43253

● Aluminum – Palfinger P190T KAMAZ-43253

● Plastic, polymer - Palfinger PD145V Mercedes-Benz Sprinter

The lighter the cradle, the higher the specific load capacity of the entire mechanism, faster and more accurate maneuvers.

Cradle insulation

For electrical installation, repair and emergency work, the boom must be protected from current. To do this, the cradle and the platform are separated by a dielectric. The presence of the letter “E” in the model name means that the cradle is insulated. Insulators are always clearly visible PSS-131.22E GAZ-C41.

Plastic cradles themselves serve as insulators and do not require additional protection.

Body lift crane zil 130

Control crane for dump trucks ZIL-MMZ-4502 and ZIL-MMZ-45021

The control valve (Fig. 12) contains a plunger-spool 2, safety and check valves.

The safety valve consists of a spring o, a ball U, a pusher 7 and a plug 6 with a sealing aluminum washer 4. Adjustment is made with washers 8.

The check valve includes a ball 13, a lower cross 12, an upper cross 11 and a seat 14 with an o-ring 15. The check valve parts are inserted into the body of the control valve when it is installed on the pump.

A rubber o-ring 3 is used to seal the plunger-spool.

Next to ring 3 in the valve body there is an annular groove connected through the drainage channel “E” with the drain pipeline.

The mounting and technological holes in the control valve body are closed with two plugs 10 with conical threads.

Rice. 12. Control valve: 1

frame; 2—plunger-spool; 3—o-ring; 4—sealing washer; 5 — safety valve spring; 6 — safety valve plug; 7—pusher; 8—adjusting washers; 9—safety valve ball; 10—cork; 11—upper cross; 12—lower cross; 13—check valve ball; 14—check valve seat; 15—o-ring; “A”—hole for the drain pipe fitting; “B”—hole for the high pressure pipeline fitting; “C”—channel from the pump discharge cavity; “E”—drainage channel; “P”—drain channel (all channels, holes and plugs are conventionally combined in one plane)

On dump trucks, lifting mechanisms are used that are hydraulically driven from the vehicle engine.

In this case, two design options for the lifting mechanism are possible: – with swinging cylinders and a hinged connection of the rods with the bottom of the body platform; – with swinging cylinders and a lever-balancer system for influencing the body platform.

When the lifting mechanism operates, part of the engine power (through the power take-off box, oil pump, control valve, check valve, lifting mechanism cylinder) is transferred to the dump truck body platform.

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The power take-off ensures the transmission of torque from the vehicle's gearbox to the oil pump of the lifting mechanism. The power take-off box is attached to the gearbox hatch on the right side. The drive shaft together with the drive gear moves forward or backward in the power take-off housing using the lifting mechanism on and off lever. When the drive shaft moves to the right (in the figure, the lever is in position), the gear meshes with the gear of the reverse gear block of the transmission, in which the gear shift lever must be in the neutral position.

The drive shaft gear, having constant engagement with the driven gear, transmits rotation from the gearbox reverse gear to the oil pump drive shaft. The latter has a splined connection using a bushing with the driven gear of the power take-off.

The gear-type oil pump has a device similar to that of the oil pump in the lubrication system of a car engine. The pump provides operating pressure in the hydraulic system of the lifting mechanism up to 8 MPa.

The control crane allows you to raise and lower the body platform and, if necessary, fix it in intermediate positions. It is installed on the upper platform of the oil pump housing. The spool moves in the valve body using a rod, which is connected to the power take-off lever. In this case, the spool, occupying different positions in the valve body c, communicates the oil supply channel from the oil pump d with the channel, the continuation of which is the high pressure pipeline. Through this pipeline, oil is pumped into cylinder a of the lifting mechanism. In another position, the control valve spool communicates with the oil drain channels into the oil tank.

Tables of technical characteristics of telescopic lifts

Table Light trucks

Table Heavy city trucks

MShTS according to the classification of the USSR Ministry of Montazhspetsstroy is an Articulated Machine for Transport Construction, in this case the second model, modernization of A.

It is clear that the MShTS-2 lift appeared in the interests of the Ministry of Transport and Construction and was produced since the early 1960s (confirmed by reference books), but at which enterprise it is not documented, and on the website of Venta, the main manufacturer of this machine, the start of production is indicated in 1975. I think that this gap is due to the fact that this enterprise at that time belonged to the Ministry of Medium Machine Building, the main manufacturer of equipment and machines for the nuclear industry, which imposed a high level of secrecy.

Developer: PKB Glavstroymekhannzatsii Ministry of Transport of the USSR.

Manufacturer (most widespread): Nizhny Turinsky Machine-Building Plant of the Ministry of Medium Machine Building of the USSR, Nizhnyaya Tura, Sverdlovsk region. Since 1998 - OJSC Nizhneturinsky Machine-Building.

- since 1977 Zuevsky Energy-Mechanical Plant of the Ministry of Energy and Electrification of the USSR, Zugres, Donetsk region. Zugres - abbreviation - ZUevskaya State District Electric Station.

Initially, these installation hydraulic lifts were intended for the installation of contact network devices from the “field” and equipment of open parts of traction substations. Subsequently, due to their successful design, they became widespread in many areas of the national economy. They were also produced in small batches in the 1990s at the Kalachevsky Automobile Repair Plant, at the Krasnodar RMZ on the ZIL-130 chassis, models 3 and 4, possibly others.

Mounting towers with an articulated boom were produced in three modifications - MShTS-2A, MShTS-2P and MShTS-2T with a unified upper structure and differed in the chassis. The mounting hydraulic lift MShTS-2A is mounted on the chassis of a ZIL-157K vehicle (later also ZIL-131), MShTS-2P is mounted on a railway platform, and the hydraulic lift MShTS-2T is mounted on the chassis of a skidder TDT-60/75.

The design of the mechanism allows the cradles to be fed not only vertically, but also to the side at any angle, as well as into an area located 7.5 m below the car parking level at an angle of 90°.

The equipment of the upper structure of assembly hydraulic lifts includes: a support frame, a slewing ring, a slewing frame with a counterweight, a lifting winch with a load rope and a hook cage, a slewing frame rotation mechanism, a double-jointed articulated boom, a hydraulic cylinder for tilting the lower arm of the boom, a hydraulic cylinder for the lifting and folding mechanism upper boom arm, two mounting baskets and a remote control. The lower ring of the ball slewing ring is rigidly bolted to a support frame mounted on the chassis of a car or tractor, and the upper ring is connected to the turntable.

The rotating platform contains a lifting winch, a cast iron counterweight and brackets for pivoting the lower arm of the boom and the base of the knee tilt hydraulic cylinder to the platform frame.

The turntable rotates by a mechanism consisting of a hydraulic motor, a worm gearbox and two single-stage spur gearboxes. The large gear of the second cylindrical gearbox is rigidly connected to the turntable frame.

The boom arms, 6 and 10 m long, are made of thin sheet steel using welding and are connected to each other by an axial hinge. The base of the lower arm of the boom in the form of a jib is pivotally connected to the turntable bracket. At the free end of the upper arm of the boom, two mounting baskets are suspended, one of which houses the remote control. The design of the suspension of the mounting baskets ensures their vertical placement at any position of the upper arm of the boom, which is achieved by a special tracking device built into the mast.

The mechanism for lifting and folding the upper arm of the boom consists of two hydraulic cylinders with rope pulleys. The hydraulic cylinders are rigidly fixed to the lower arm of the boom. The upper blocks of rope pulleys are attached to the lower end of the upper boom bend and rotate with it (when lifting and folding) on ​​the hinge axis connecting the upper and lower boom bends, and the lower blocks are fixed at the base of the lower boom bend.

A lifting winch with a lifting capacity of 2 t is used when operating assembly hydraulic hoists as jib cranes during installation and loading and unloading operations for loads up to 400 kg at a height of up to 17.8 m. The winch drive mechanism consists of a hydraulic motor and a two-stage spur gearbox.

The installation hydraulic lift MShTS-2A is equipped with four support hydraulic jacks, and the MShTS-2T is equipped with a traction winch. The drive of all mechanisms of mounting hydraulic lifts is hydraulic with remote control from the cabin and mounting baskets.

The maximum boom reach is 15.35 m, and the maximum lifting height of the baskets is 17.8 m.